export function buildChannelUrl(baseHref: string, channel: string, slug: string) {
  const normalized = baseHref && baseHref !== "#" ? baseHref : `/download/${slug}`;
  const url = new URL(normalized, "https://download-nova.local");
  url.searchParams.set("utm_source", "download_nova");
  url.searchParams.set("utm_medium", "site");
  url.searchParams.set("utm_campaign", "resource_download");
  url.searchParams.set("channel", channel);
  return normalized.startsWith("http") ? url.toString() : `${url.pathname}${url.search}`;
}